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- W4310738863 abstract "Abstract. A set of Doppler power spectrum processing methods for TJ-II, a vertical sensing 94 GHz millimeter-wave cloud radar(MMCR), is proposed to distinguish clouds and enhance the data quality. The noise level is estimated by a modified segment method with 2-D segments. A two-step cloud signal mask method is proposed to distinguish clouds and noise. A Gaussian filter with adaptive standard variance is used to improve detection performance at the boundary of clouds and noise. Square signal blocks were constructed to test our method. Velocity dealiasing is carried out combined with a pre-dealiasing processing and the dual Pulse Repetition Frequency (PRF) technique to address a particular phenomenon called half-folded in MMCRs, which can not be fixed by post-processing at the base datum stage. Some observations of TJ-II are used to demonstrate our method. A comparison between our method as pre-processing and the method as post-processing proposed by Key Laboratory for Semi-Arid Climate Change of the Ministry of Education and College of Atmospheric Sciences, Lanzhou University, was carried out using one-day observation. It was found that our method shows some advantages in cloud base detection." @default.
- W4310738863 created "2022-12-17" @default.
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- W4310738863 date "2022-12-06" @default.
- W4310738863 modified "2023-09-23" @default.
- W4310738863 title "Doppler power spectrum processing methods for a vertical sensing 94 GHz millimeter-wavelength cloud radar" @default.
- W4310738863 doi "https://doi.org/10.5194/amt-2022-302" @default.
- W4310738863 hasPublicationYear "2022" @default.
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